Cambridge IGCSE Mathematics Formula Sheet
==================================================

ALGEBRA
Quadratic formula: x = (-b ± √(b²-4ac)) / 2a
Gradient: m = (y₂-y₁)/(x₂-x₁)
Distance: d = √((x₂-x₁)² + (y₂-y₁)²)

GEOMETRY
Circle area: A = πr²
Circle circumference: C = 2πr
Sphere volume: V = (4/3)πr³
Cone volume: V = (1/3)πr²h
Cylinder volume: V = πr²h

TRIGONOMETRY
sin A/a = sin B/b = sin C/c (Sine Rule)
a² = b² + c² - 2bc cos A (Cosine Rule)
Area = (1/2)ab sin C